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src/sql/engine/expr/ob_expr_oracle_trunc.h

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+/**
+ * Copyright (c) 2021 OceanBase
+ * OceanBase CE is licensed under Mulan PubL v2.
+ * You can use this software according to the terms and conditions of the Mulan PubL v2.
+ * You may obtain a copy of Mulan PubL v2 at:
+ *          http://license.coscl.org.cn/MulanPubL-2.0
+ * THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
+ * EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
+ * MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
+ * See the Mulan PubL v2 for more details.
+ */
+
+#ifndef _OCEANBASE_SQL_OB_EXPR_ORACLE_TRUNC_H_
+#define _OCEANBASE_SQL_OB_EXPR_ORACLE_TRUNC_H_
+#include "lib/ob_name_def.h"
+#include "share/object/ob_obj_cast.h"
+#include "sql/engine/expr/ob_expr_operator.h"
+
+namespace oceanbase {
+namespace sql {
+class ObExprOracleTrunc : public ObFuncExprOperator {
+  public:
+  explicit ObExprOracleTrunc(common::ObIAllocator& alloc);
+  explicit ObExprOracleTrunc(common::ObIAllocator& alloc, const char* name);
+  virtual ~ObExprOracleTrunc()
+  {}
+  virtual int calc_result_typeN(
+      ObExprResType& type, ObExprResType* params, int64_t params_count, common::ObExprTypeCtx& type_ctx) const;
+  virtual int calc_resultN(
+      common::ObObj& result, const common::ObObj* params, int64_t params_count, common::ObExprCtx& expr_ctx) const;
+  virtual int cg_expr(ObExprCGCtx& expr_cg_ctx, const ObRawExpr& raw_expr, ObExpr& rt_expr) const;
+
+  protected:
+  int calc_with_date(common::ObObj& result, const common::ObObj& source, const common::ObObj& format,
+      common::ObExprCtx& expr_ctx) const;
+  int calc_with_decimal(common::ObObj& result, const common::ObObj& source, const common::ObObj& format,
+      common::ObExprCtx& expr_ctx) const;
+
+  int calc_result1(common::ObObj& result, const common::ObObj& input, common::ObExprCtx& expr_ctx) const;
+  int calc_result2(
+      common::ObObj& result, const common::ObObj& input, const common::ObObj& param, common::ObExprCtx& expr_ctx) const;
+
+  private:
+  // disallow copy
+  DISALLOW_COPY_AND_ASSIGN(ObExprOracleTrunc);
+};
+
+class ObExprTrunc : public ObExprOracleTrunc {
+  public:
+  explicit ObExprTrunc(common::ObIAllocator& alloc);
+  virtual ~ObExprTrunc()
+  {}
+
+  private:
+  // disallow copy
+  DISALLOW_COPY_AND_ASSIGN(ObExprTrunc);
+};
+
+}  // namespace sql
+}  // namespace oceanbase
+#endif  //_OCEANBASE_SQL_OB_EXPR_ORACLE_TRUNC_H_